Q. Study the four statements (a–d) given below and select the two correct ones out of them (a) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers (b) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates (c) Predators ultimately lead to the extinction of prey species (d) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders The two correct statements are:
A) (a) and (b)
B) (b) and (c)
C) (c) and (d)
D) (a) and (d)
Explanation
[Solution from source] The lion and the sparrow both eat other organisms, so both are consumers. When the predatory starfish Pisaster was removed from rocky shores, more than 10 invertebrate species disappeared, which shows it maintains diversity. Predators usually keep prey numbers in check rather than wiping them out, and nicotine and strychnine are defensive chemicals, not metabolic disorders. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.